Question 1

What is the definition of the term "opaque"?

Accepted Answer

A term used to describe a material that absorbs and/or reflects light and does not allow light to pass through.

Answer

The force exerted per unit area

Answer

A small cloudlike mass of gas and dust in space

Answer

A measure of the acidity or alkalinity of a solution

Question 2

In science, what is the definition of a "hypothesis"?

Accepted Answer

A statement that can be tested scientifically through experiments and/or other scientific investigations.

Answer

The movement of water through rock or soil.

Answer

A scientific principle based on many observations that is without exception.

Answer

A replica or description designed to show the workings or structure of an object or system.

Question 3

What is the definition of the term "Light-year"?

Accepted Answer

The distance a ray of light travels in a vacuum in one year.

Answer

The speed at which a planet rotates on its axis.

Answer

The time it takes for a planet to orbit its nearest star.

Answer

A unit used to measure the brightness of distant galaxies.

Question 4

In the study of biology and ecology, what is the definition of a "niche"?

Accepted Answer

The unique position occupied by a particular species in terms of the area it inhabits and the function it performs within the community.

Answer

The highest Linnaean classification into which organisms are grouped; above phylum.

Answer

A type of cell or organism that has identical rather than different alleles for a particular trait.

Answer

The sum of all the forces acting on an object within an ecosystem.

Question 5

What is the definition of the term "nebula"?

Accepted Answer

A large cloudlike mass of gas and dust in space that may lead to the formation of a star.

Answer

The distance a ray of light travels in a vacuum in one year.

Answer

A measure of the acidity or alkalinity of a solution based on a scale from zero to fourteen.

Answer

The center region of an atom where protons and neutrons are located.

Question 6

What is the definition of the term "homozygous"?

Accepted Answer

A type of cell or organism that has identical rather than different alleles for a particular trait.

Answer

A factor, usually being measured or observed, that responds to another factor.

Answer

The cell structure that contains a cell's genetic material.

Answer

The parental generation in a genetic cross.

Question 7

What is the definition of the term "infiltration"?

Accepted Answer

A process in which water soaks into the soil.

Answer

The temperature at which a solid changes to a liquid.

Answer

A measure of the acidity or alkalinity of a solution.

Answer

The movement of water through rock or soil.

Question 8

In a scientific experiment, what is the definition of an "outcome variable" (also known as a dependent variable)?

Accepted Answer

A factor, usually being measured or observed, that responds to, or depends on, another factor (test variable).

Answer

A replica or description designed to show the workings of a system.

Answer

A statement that can be tested scientifically through experiments.

Answer

A scientific principle based on many observations that demonstrate it to be without exception.

Question 9

What is the definition of the term "net force"?

Accepted Answer

The sum of all the forces acting on an object. When forces are balanced, the net force is zero and the object’s motion will remain the same. When forces are unbalanced, the net force is nonzero and the object’s motion will change.

Answer

A scientific principle based on many observations of naturally occurring events that demonstrate it to be without exception.

Answer

The smallest unit of matter of a substance that retains all the physical and chemical properties of that substance.

Answer

The force exerted per unit area on the surface of a solid, liquid, or gas.

Question 10

What is the definition of the term "molecule"?

Accepted Answer

The smallest unit of matter of a substance that retains all the physical and chemical properties of that substance; consists of a single atom or a group of atoms bonded together.

Answer

The center region of an atom where protons and neutrons are located.

Answer

A large cloudlike mass of gas and dust in space that may lead to the formation of a star.

Answer

A type of cell or organism that has identical rather than different alleles for a particular trait.

Question 11

What is the definition of the term "kingdom"?

Accepted Answer

The highest Linnaean classification into which organisms are grouped; above phylum.

Answer

The parental generation in a genetic cross.

Answer

The unique position occupied by a particular species in terms of the area it inhabits.

Answer

A type of cell or organism that has identical rather than different alleles.

Question 12

What is the definition of the term "scientific law"?

Accepted Answer

A scientific principle based on many observations of naturally occurring events that demonstrate it to be without exception under certain stated conditions.

Answer

A measure of the acidity or alkalinity of a solution based on a scale from zero to fourteen.

Answer

A statement that can be tested scientifically through experiments and/or other scientific investigations.

Answer

A replica or description designed to show the workings or structure of an object or system.

Question 13

What is the definition of the term "nucleus"?

Accepted Answer

The center region of an atom where protons and neutrons are located; also, the cell structure that contains a cell’s genetic material.

Answer

A term used to describe a material that absorbs and/or reflects light and does not allow light to pass through.

Answer

A large cloudlike mass of gas and dust in space that may lead to the formation of a star.

Answer

The smallest unit of matter of a substance that retains all the physical and chemical properties of that substance.

Question 14

What is the definition of the term "pH"?

Accepted Answer

A measure of the acidity or alkalinity of a solution based on a scale from zero to fourteen.

Answer

The force exerted per unit area on the surface of an object.

Answer

The temperature at which a solid changes to a liquid.

Answer

A process in which water soaks into the soil from the surface.

Question 15

What is the definition of the term "pressure"?

Accepted Answer

The force exerted per unit area.

Answer

The sum of all the forces acting on an object.

Answer

The movement of water through rock or soil.

Answer

The temperature at which a solid changes to a liquid.

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